I'll chime in here as well as Benno's.
Something tells me there was an issue with the mold. I purchased a set from Toy Soldier HQ as well as early on from a dealer in the Ukraine. And each set had only one sprue that contained the Thompson guy (and he had a LOT of flash near where he was attached to the sprue. It appears that there were only enough complete sprues to add one to the box and the rest were cut off with other random figs added to keep with the "piece count". Toy Soldier HQ said all the sets they ordered also only contained a maximum of one complete sprue. It sounds like, if you received no Thompson figs, that maybe the mold gave out before there was any more complete sprues for later boxes. Just a guess unless MARS chimes in.